Can my solar-powered watch/clock be charged indoors by the light from a fluorescent lamp or incandescent lamp?

Your solar-powered watch/clock can be charged indoors by the light from a fluorescent lamp or incandescent lamp. However, charging your solar-powered watch/clock by indoor lights will take longer than charging it by the sunlight.
For wall clocks and alarm clocks, charging by a fluorescent lamp is the most efficient way. Avoid charging such clocks under direct sunlight, as doing so may cause clock failures.